Platen roller



Dec. 20, 1932.

M. H. ALEXANIAN PLATEN ROLLER Filed March 15. 1330 Wmmmw 3 R I BYZATTORNEY Patented Dec. 20, 1932 UNITED STATES HIHBAN H. ALEXANIAN, OFCOYTESV'ILLE, NEW JERSEY PLATEN ROLLER Application filed latch 15, 1930.Serial No. 436,017.

same.

In the customary form of platen roller made of a rubber compound whennew, it embosses the paper and after aperiod of time hardens. Aftertheplaten hardens it no longer presents a surface which permits of theproper type impression and therefore must be discarded. Both the rubberplaten and various substitutes therefor furnish, when the keys strikethe paper, the greatest element of noise in the operation of atypewriter.-

Amongst the objects of my invention are to provide a platen roller for atypewriter which will have a longer life. reduce the noise incident tothe keys striking the paper on the platen and one which will be lighterin construction and cheaper to manufacture.

Referring to the drawing:

Figure 1 is a, perspective view embodying the principles of myinvention.

Figure 2 is a broken detail sectional view.

Figure 3 is a broken detail sectional view of a modified form of platenroller.

In carrying out my invention I propose to provide a platen 1 having aninternal core 2 preferably made of paper pulp or cardboard. About core2, I propose to wind bias strips of muslin or other fabric 3 spirally inlayers, each spiral layer being wound in the opposite direction, thespiral strips having their sides abutting when wound to give a smoothsurface; The use of bias strips permits of the fabric 3 conforming tocore 2 without bulging and permits of the winding under pressure therebyobviating the necessity of a binder between the strips, the strips beingunder tension grip core 2, in strong frictional engagement. Fabric 3 isapplied in layers to the desired thickness. The outermost layer 3' Ipreferably coat with shellac 4 although other forms of filler and bindermight be used.

Although I have shown in my preferred embodiment a platen entirely builtup of fabric where it is desired for increased resiliency, a layer ofcork 5 can be inserted beneath the outermost layers of fabric 3 as shownin the modified form (Figure 3).

My invention adapts itself to the manufacture of platens in longcylinders and thereafter cutting the cylinders into the desired lengthsfor the particular make of the machine for which the platen has beenWound. Such a method of manufacture reduces cost as the winding may bedone by machine. In the modified form (Figure 3) I'propose to insertadjacent the outermost layer 3 or layers, a layer of cork 5, which issecured between the fabric layers 3 by a binder of shellac, glue; orother binding material. Where a Very smooth and velvety surface isrequired I propose to mix with the shellac for the outer surface binderpowdered cork 4 to fill the interstices of the outer layer fabric 3.This surfacing, how- I ever, is very thin and functions to fill in thefabric 3 and not as a coating.

It will thus be seen that I have provided a platen for typewriters whichis light in weight, durable, permanent and which by reason of the innerbias fabric strips having no binder function as a sound deadener andfurnish the required elasticity to permit of long usage without changeor variation in form or contour.

What I claim is:

1. A'platen roller having a core, strips of bias fabric spirally woundabout said core, a cork layer about said fabric strips, additionallayers of fabric about said cork, a filler for said outermost fabriclayers, the outermost fabric layer impregnated with a binding materialto bind same to the underneath layer.

2. A platen roller, strips of fabric wound spirally in layers, one layerupon the other to form a platen, the outer layer of the fab ric havingits interstices filled with a filler of minute solid particles and anadhesive to furnish a smooth surface and to prevent unwinding of thefabric.

3. A platen roller relatively narrow strips of bias fabric woundspirally, one layer upon the other, each of said layers wound in theopposite direction, a cork layer about said fabric layers, an additionalouter layer of fabric, said outer layer having the interstices of thefabric filled with minute solid particles and an adhesive.

Signed at New York, in the county of New York and State of New York,this 10th day of March, A. D. 1930.

MIHRAN H. ALEXANIAN.

